Hack-saw frame



Jm 31. 19m i C. R. HANNING uAcxsAw mu Filed July 30, 1925 enfoui,

t ...trl-Z- J- Patented Jan. 3l, 1928.

UNITI-:D STATES CHESTER RAY HANNING, oF NORTH BEND, OREGON. j

HACK-SAW FRAME.

Application `lled July 30,

This invention relates lto hacksaws and `has for its object the`provision of a novel hacksaw frame embodyingmeans whereby a y saw blademay be very quickly and easily 5 placed in position or removed, as thecase may be, andA clamped securely .with the proper degree of tension onthe blade to 1nsure efficient operation thereof. s c An important objectof theinvention is lo to provide a hacksaw frame which is capable ofholding hacksaw blades of different lengths, means Vbeing 4moreoverprovided wherebythe necessary tension on the blade may be had regardlessof the length thereof.

16 lAnother object of the. invent-ionis the provision of a hacksaw framehaving its bladeengaging elements so constructed or formed that ablademay-be readily mounted for sawing in the same ,plane as the back20- or at right angles theretoj A more specific object is the provisionof a hacksaw frame having a baclr'carryingtan anchor member adjustabletherealong for mounting one end of a saw blade, the frame having itshandle end carrying a peculiarlyV constructed and fmounted cam means forapplying a longitudinal pull upon theblade so be simple and inexpensiveto manufacture,

eflicient in use,` a great time and labor saver,

durable in service, and aggeneral improvement in the art. y

With the above and other objects and advantages inr view, the inventionpreferably consists in the combination and arrangement of parts and thestructural features to be hereinafter more i fully described, claimedand illustratedfin the accompanying drawing, in which :.-e

Figure 1 is a side elevation of the complete hacksaw showing a blade` insecure-d position.

Figure 2 is a fragmentary elevation ofl the handle end showing the bladeholding means in released position.

Figure 3 is a longitudinal section through the handle end showing theblade holding means in operative position, the parts being in the sameposition as in Figure 1.

Figure 4 is an inverted edge view of the handle end withthe bladeomitted, and

1926.V Serial'No. 126,024.

Figure 5 is a detailperspective view of A the saw as comprising'a back10 formed as an elongated bar of suitable material and dimensions andpreferably rectangular in cross section.y This bar is straightthroughout its' major portion but has one Vendv 11 curved andterminatingin an extensiond2- formed ory otherwise provided with a guidesleeve .13 arranged in parallel relation ntothe back or bar 10 `andhaving a preferably rectangular bore or opening 1,11 therethrough.v

Thenumeral 15 designates the handle which may be constructed of wood, asis l.generally customary, the handle being preferably slotted orbifurcated, as shown, so as to straddle the portion 11 of the frame, andrigid connection being effected-by, meanso'f ',bolts, screws or othersecuring elementsl,

it being understood, however, that such details as` these may be readilyvaried within the scope of the invention,

z" Carried by the back-or bar member llOisy l the front anchor 4memberdesignated ask a whole by the numeral 17, this member being provided forthe pur ose of, holding the forward end of the1 saw s lade 1S. l.Thevmember 17 is representedas including an arm `19 having one end formedor'otherwise provided with a yokeQO slidable along the back or bar 10.so that the member 17 may be shifted bodily towardor fromthe handledepen-ding upon the length of the saw blade rto be-used. The member 17is intendedV to lock in position witlirespect to the back or bar 10 iupon slight lateral rocking movementV with respect thereto, and kforthis reasonrit` 1s shown as equipped with a ulateral projectionory heelpiece 21 adapted to bear againststhe inner or under edge of theback orbar 10. The end of the arm 19 remote from the bar .10 is provided with alateral extension :22

which is preferably square in` cross section anduprovided on each flatfasce witha pinzor equivalent `projection 23 uponwhich may be engagedthe hole 2li commonly provided at oneend ofthe hacksaw blade.

The means connected with therear end of` Vthe blade for maintainingproper tension thereon comprises apullbar 25 preferably Vsquare in,cross section to prevent turning thereof and equipped on each faceYwith a pin at therear end of the blade. i In actual praetice themembers 22 and 25 are preferably similar and it will be -quiteapparentthat there are four possible positionsin which the blade may bemounted, depending upon the nature of the work to be done. Themelnber 25slides through the square bore 14 in the" sleeve or guide box llfand hasitsrear portion preferably bifurcated at 28, a roller 29 ybeing pivotedwithin thebifurcation.

Pivotally mounted in any suitable manner upon the extension l2, asshowny at 30, is a loop-like hand-hold-31 constituting an actu- Iatinglever andmovable within the space between the'bar 10, the extension V12andthe end portion 11 and adapted to iit snugly againstthe inner orconcave sideyof the lat- `member 25" longitudinally and therebycontrollingv thetension on the blade. The location and shape ofthecurved linger 32 are such that whenthe hand-hold 31 is in itsoperative position as shown in Figures 1 and 3, the active surface 33 ofthe finger will engage the roller 29 at a point past centerwth 301respect to the pivotal mounting of the hand` hold so that after theblade has been placed under tension the pull of'the blade against thecam member 32 will act tohold the member 31 firmly against the inneredge of the end portion 11. The front portion of the loop shapedactuatin' lever 31 serves 'to protect the fingers of tthe operator, whenthe,v

device is in use. v

In the use of the device, it will be seen thatthe member 17 must ybeshifted along the back or bar 10 toa 'certain selected point dependingupon the length of the Vsaw blade 18 to be used. The forward `end of theblade has thehole 24engaged upon a selected one of the pins orprojections 23., The handhold 31 is then swung forwardly or away fromthe handle 15 into the position shown in Figure 2 and the hole 27 at therear end ofthe blade is engaged upon the proper one of the pins Theoperator then may place the palm of his hand against the outer orrearsurface of the handle and vpass his fingers through the hand-hold orloop 31. By the simple act of closing the hand the member 31 will thenbe drawn toward and` into engagement with the end portion 11 of` theframe. Whenthis is done the concaveor active face .33 of the cam 32 willegage against the roller 29v and impart longitudinal movement to themember 25 and this will of course place the saw blade under tension.

.Whenever it is necessary to change a blade,

release is effected by forcing the member 31 forwardly into thepositionshown in Figure 2. Obviously 4this may be done very simfinger 32which ply by pulling upon it with the forefinger, though naturally thereare no limitations as to the exact manner of operation chosen by theuser.,

From the foregoing description and a i study of the drawing it will beseen that I have thus provided a simply constructed and Vvery quickly`and easily operated hacksaw frame which will hold saws of any length,

' within reasonable limits, with, absolute lirln-y -ness and-security.vIt will be noted'that the saw blade may be placed in a plane with theback or at right angles thereto, with the saw teeth facing in aselecteddirection, there being four possible positions and, if-desired,the blade may be reversed to cut on a push stroke or a pull stroke. Itis believed that the construction, operation and advantages will bereadilyapparcnt to one skilled in the art without further explanation.

While I have shown and described apreferred embodiment of the invention,it should he understood that the disclosure is merely an exemplificationof the principles involved as it is conceivable that various changesmight be made to widen the field of utility and increase theadaptability of the device, and Iy reserve the right to make allvariations and `modifications desired, provided they constitute nodeparture from the salient features of the invention or the scope of thesubjoined claims. v

'What' is claimed iszl. A hacksaw frame comprising a longitudinal backbar bent laterally at one end to constitute a handle, said handle havinga forward extension at its free end, an adjustable front anchor memberlocated at the front end of the back bar, a -yoke straddling the latterand pivotally connected to the anchor member to allow the same to rock,a rearwardly extending heelV piece carried by the said member bearingagainst the inner or under edge of the back bar when rocked, to hold theanchor member against rearward movement, means carried at the free endof the anchor member for detachable connection with a haeksaw blade, alever pivoted to the handle to swing inwardlyand rearwardly, said leverhaving an arln extending ,downwarclly and provided with a rearward camface, a pull* bar slidably mounted in the handle extension anddetachably connected to the blade at one end `and rearwardlyextending'heel piece carried by the anchor member and bearing a ainstthe inner or under edge of the back Iiar when rocked, to hold the anchormember against rearward movement, means carried at the.

free end of the anchor member for detachf able connection with a hacksawblade, a swingable lever mounted in the forward extension of the handle,a guide box carried by said extension, a pull bar sli-dably mounted insaid box to move longitudinally of the frame, said bar having means atits forward end `for detachable connection with a hacksaw blade andbifurcated at its rear end where extending beyond the guide box, aroller mounted in the bifurcation, a cam arm carried by the lever toengage the roller and draw the pull bar rearwardly when the lever isgripped to the saw handle.

3. A hacksaw frame comprising a back bar having one end formed into ahandle provided with a forward extension in spaced relation to the backbar, a guide box mounted on said extension, a front anchor memberslidably mountedon the front end of the back bar, the lower end of theanchor member having means for detachable connection to a saw blade,means for resisting rearward Vmovement of the front anchor member whenpulling strain Vis imparted, an upstanding actuating lever pivoted atits lower end to the handle extension, a pull bar mounted in the guidebox and extending forwardly and rearwardly of the same, the front end ofthe bar having means for detachable connection to the saw blade andtherear end thereof being slotted, a roller mounted in said slot, the axisof the roller being below the pivotof the actuating lever, and a curvedcam arm carried by said lever and extending through the slot of the pullbar and engaging the roller, to pull the saw blade rearwardly andtension the same when the lever is gripped to the handle.

4. A hacksaw frame comprising an elongated back bar having one endformed into an offset handle provided with a forward extension at itsfree end in spaced relation to the back bar, a guide box mounted at thefront end and on one side of said extension, a front anchor memberslidably mounted on the front end of the back bar, the lower end of theanchor member being in alinement with the said guide box and havingmeans for detachable connection to the front end of a saw blade, meansfor resisting rearward movement of the front anchor member when pullingstrain is imparted through the saw blade, an upstanding, loop-shapedactuating lever pivoted atk its lower end to the side of the handleextension, the front side of the lever acting asa finger protector, alongitudinally slidable pull bar mounted in the guide box and extendingforwardly and rearwardly of the same, the front end of the bar havingmeans for detachable connection to the rear end of the saw blade and therear end thereof being vertically slotted, a roller mounted in said slotat the end of the bar, the horizontal axis of the roller being below thepivot of the actuating lever, and a curved cani arm carried by the frontside of said lever and extending down through the slot of the pull barand engaging the front side of the roller, the rear roller-engaging edgeof the said arm being curved and closer, at the lower free end of thearm, to the lever pivot than at its upper end, to pull the saw bladerearwardly and tension the saine when the lever is gripped to the handleand to lock said leveragainst the frontside of the same by said tension.

5. A liaclsaw frame comprising a back bar bent to form an offset handleat the rear end thereof, slidable means mounted on the front endof thebar for connection with a saw blade, means for preventing rearward amovement of the front saw holding means, a forward extension carried bythe free end of the handle, a longitudinally slidable sawengaging barmounted on said extension, said bar having a roller at its rear end,'anupstanding actuating lever located in ad vance of the saw handle andadapted to be gripped against the front side thereof, said lever beingpivoted at its lower endv to said handle extension and above the axis ofsaid roller, an eccentric arm carried by the lever and engaging thefront side of the roller at all times, the rear edge of said arm beingsuch shape as to pull the roller and slidable bar rearwardly to tensionthe saw blade when the lever is gripped to the handle and to beautomaticallylocked in such position by the pull of the saw below thelever pivot.

6. A hacksaw frame comprising a back bar, a handle at one end of saidback bar, an ancho-r bar extending from the opposite end of the back barand carrying a sawblade securing means, a hand guard pivoted upon theend of the handle to swing up against the inner face of the handle, adownwardlyextending cam finger carried by the said guard and asawholding member provided with means for engagement with said camfinger to thereby tension they saw when the guard is raised.

In testimony, that I claim the foregoing as my own, I have heretoaffixed my signa-V ture.

CHESTER RAY HANNING.

